LOCATION WINNIPEG MOEstablished Series
TAXONOMIC CLASS: Fine-silty, mixed, active, mesic Typic Paleudalfs
TYPICAL PEDON: Winnipeg silt loam - on an west facing convex structural bench of 4 percent slope in an alfalfa pasture at an elevation of 1,220 feet. (Colors are for moist soil unless otherwise stated.)
Ap--0 to 6 inches; brown (10YR 4/3) silt loam, light yellowish brown (10YR 6/4) dry; weak fine granular structure; very friable; many very fine roots; many very fine irregular pores; neutral (pH 6.6); 1 percent chert gravel; clear smooth boundary. (thickness of the Ap horizon is 4 to 9 inches)
Bt1--6 to 11 inches; yellowish brown (10YR 5/4) silt loam; moderate medium subangular blocky structure; friable; common fine roots; many very fine tubular pores; few faint patchy brown (7.5YR 4/4) clay films on faces of peds; neutral (pH 7.0); clear smooth boundary.
Bt2--11 to 16 inches; 50 percent yellowish brown (10YR 5/4) and 50 percent strong brown (7.5YR 5/8) silty clay loam; moderate medium subangular blocky structure; friable; common fine roots; many very fine tubular pores; few prominent discontinuous brown (7.5YR 4/4) clay films on faces of peds; few very fine prominent black (10YR 2/1) stains of Fe and Mn oxides on faces of peds; neutral (pH 7.0); clear smooth boundary. (Combined thickness of the Bt horizon ranges from 3 to 30 inches.)
2Bt3--16 to 30 inches; 40 percent red (2.5YR 4/8), 30 percent strong brown (7.5YR 4/6) and 30 percent pale brown (10YR 6/3) silty clay loam; strong medium subangular blocky structure; firm; few fine roots; many very fine tubular pores; common prominent discontinuous yellowish red (5YR 4/6) clay films on faces of peds; common medium prominent black (10YR 2/1) stains of Fe and Mn oxides on faces of peds; slightly acid (pH 6.2); clear smooth boundary.
2Bt4--30 to 38 inches; 50 percent red (2.5YR 4/8), 30 percent strong brown (7.5YR 5/6) and 20 percent pale brown (10YR 6/3) silty clay loam; moderate medium prismatic structure parting to moderate medium subangular blocky; friable; few fine roots; common fine tubular pores; many prominent discontinous yellowish red (5YR 4/6) clay films on faces of peds and in pores; common fine prominent black (10YR 2/1) stains of Fe and Mn oxides on faces of peds; many fine black (10YR 2/1) concretions of Fe and Mn oxides; strongly acid (pH 5.2); clear wavy boundary.
2Bt5--38 to 44 inches; 50 percent red (2.5YR 4/8), 40 percent strong brown (7.5YR 5/6) and 10 percent pale brown (10YR 6/3) clay loam; strong fine subangular blocky structure; firm; many very fine tubular pores; many prominent discontinous yellowish red (5YR 4/6) clay films on faces of peds and in pores; few fine prominent black (10YR 2/1) stains of Fe and Mn oxides on faces of peds; 10 percent chert gravel; moderately acid (pH 5.6); abrupt smooth boundary. (combined thickness of the 2Bt horizon is 5 to 30 inches)
3Bt6--44 to 80 inches; 70 percent red (2.5YR 4/8), 20 percent strong brown (7.5YR 5/6) and 10 percent pale brown (10YR 6/3) clay; moderate medium subangular blocky structure; firm; many very fine tubular pores; many prominent discontinous yellowish red (5YR 4/6) clay films on faces of peds and in pores; many medium prominent black (10YR 2/1) stains of Fe and Mn oxides on faces of peds; 5 percent chert gravel; neutral (pH 6.6).
TYPE LOCATION: Texas County, Missouri; about 5 miles southwest of Houston; 1,000 feet north and 200 feet west of the SE corner of section 31, T. 30 N., R. 10 W; UTM Zone 15, UTM Easting 582,480, UTM Northing 4,123,420; USGS Bucyrus quadrangle.
RANGE IN CHARACTERISTICS:
Solum thickness: 80 or more inches
A horizon
Rock fragments: 0 to 5 percent gravel
Hue: 7.5YR to 10YR
Value: 3 to 6
Chroma: 2 to 4
Chroma: 2 to 4
Texture: silt loam
Reaction: neutral to very strongly acid
E Horizon (present in some pedons)
Rock fragments: 0 to 5 percent gravel
Hue: 10YR or 7.5YR
Value: 4 or 5
Chroma: 3 to 6
Texture: silt loam
Reaction: neutral to moderately acid
Bt horizon
Rock fragments: 0 to 5 percent gravel
Hue: 5YR to 10YR
Value: 4 to 6
Chroma: 3 to 8
Texture: silt loam, silty clay loam
Reaction: neutral to strongly acid
2Bt horizon
Rock fragments: 0 to 25 percent gravel
Hue: 2.5YR to 10YR
Value: 3 to 6
Chroma: 3 to 8
Texture: silt loam, silty clay loam, clay loam, loam
Reaction: neutral to strongly acid
3Bt and 4Bt (where present) horizon
Rock fragments: 0 to 70 percent gravel
Hue: 2.5YR to 7.5YR
Value: 3 to 6
Chroma: 3 to 8
Texture: clay, silty clay, silty clay loam, sandy clay loam
Reaction: neutral to strongly acid
COMPETING SERIES: These are the Crider, Hootentown, Peridge, Ryker, and Stinesville series. Crider soils have less sand in the lower part of the argillic horizon. Hootentown soils formed in alluvium and do not have a lithologic discontinuty (2Bt horizon). Peridge soils have more sand in the upper part of the argillic horizon. Ryker and Stinesville soils have layers of glacial drift in the lower part of the series control section.
GEOGRAPHIC SETTING: Winnipeg soils are on nearly level to moderately sloping, structural benches, strath terraces, and foot slopes. Slopes range from 1 to 8 percent. They formed in about 12 to 36 inches of loess and in the underlying hillslope sediments, colluvium, or residuum. In some pedons the hillslope sediments may be underlain by alluvium instead of residuum. Mean annual temperature ranges from 54 to 58 degrees F., and the mean annual precipitation ranges from 38 to 45 inches.
GEOGRAPHICALLY ASSOCIATED SOILS: These are the Cedargap, Hartville, Pomme, and Waben soils. Cedargap soils have more rock fragments throughout the profile and are on floodplains. Hartville soils are clayey, somewhat poorly drained, and are on stream terraces. Pomme soils have more rock fragments and are on similar positions. Waben soils have more rock fragments and are on alluvial fans.
DRAINAGE AND PERMEABILITY: Well drained. Runoff potential is low to high. Permeability is moderately slow. The saturated hydraulic conductivity is moderately high.
USE AND VEGETATION: This soil is used mainly for hay and pasture. Native vegetation is mixed hardwoods, primarily oaks and hickory.
DISTRIBUTION AND EXTENT: The Ozarks region (MLRAs 116A and 116B) of southern Missouri and possibly northern Arkansas. The series is of small extent.
MLRA SOIL SURVEY REGIONAL OFFICE (MO) RESPONSIBLE: Morgantown, West Virginia
SERIES ESTABLISHED: Laclede County, Missouri, 1996.
REMARKS: Diagnostic horizons and features recognized in this pedon are:
Ochric epipedon - the zone from the surface to a depth of 6 inches (Ap horizon)
Argillic horizon - the zone from 6 to 80 inches. (Bt, 2Bt, 3Bt horizons)
This soil is being mapped in the Jefferson City geologic formation in Missouri.
ADDITIONAL DATA: Missouri Soil Characterization Lab Data Number -- M8821502